Tài liệu Package Evaluation Training_5_conductivity&redink_customer

26/09/2012 Package Evaluation T i i Training Conductivity and Red Ink Test PE-05/2012-04-01 Agenda 1. Package Integrity – General information 2. Conductivity Test + Practical 3. Red ink Test + Practical PE-05/2012-04-01 / 2 1 26/09/2012 1. Package Integrity – G General l Information I f ti Conductivity and Red Ink Test PE-05/2012-04-01 1. Package Integrity – General Information ► This test method aimed to confirm the tightness of microbiological barrier for aseptic package. package ► The microbiological barrier consist of Inner polyethylene, Aluminum Foil, Lamination layer between the Al-foil & paper board. ► Following test methods used to find out the integrity of microbiological barrier: • Conductivity y test - Screen • Red ink test - Tightness • Copper test – Contact position PE-05/2012-04-01 / 4 2 26/09/2012 1. Package Integrity – General Information 1. Outer PE 2. Paperboard p 3. Lamination 4. Al-foil 5. Inner coating 1 6. Inner coating 2 Depth of Conductivity Red Ink Defect Test Test Tight Package Corrective Actions Needed? A X X No Yes B X - Yes Yes C X - Yes Yes D - - Yes No PE-05/2012-04-01 / 5 2 Conductivity 2. C d ti it Test T t Conductivity and Red Ink Test PE-05/2012-04-01 3 26/09/2012 2. Conductivity Test Principle ► Detect Rupture p in Inner PE layers, y , which leaves Aluminum foil uncoated ► If positive reading, confirm package integrity by red ink test Note: Only Red ink test used for high fat products, fat creates insulating layer on the inside of the packages and prevent current from circulation. Note! Conductivity test cannot detect blocked TS PE-05/2012-04-01 / 7 2. Conductivity Test Set up of the conductivity test 3 6 5 1 Salt solution: 7 Dilute 10 gram of NaCl or salt to 1 litre of water. (1% salt solution) 4 2 Note: Ammeter part no. 90243-0110 PE-05/2012-04-01 / 8 4 26/09/2012 2. Conductivity Test Preparation of the samples ► Cut the p package g in two halves, or leaving the LS side intact to keep the package in one sample. ► Rinse the packages with clean tap water ensuring that all product residue is gone. PE-05/2012-04-01 / 9 2. Conductivity Test Preparation of the samples ► Dry thoroughly the cut edges of the package with paper towel. Trim the edges if necessary. Wet edges can give a false positive. PE-05/2012-04-01 / 10 5 26/09/2012 2. Conductivity Test Procedure Add 1% salt solution into a plastic basin. ► Fill a third of the package with the salt solution ► Immerse the package in the basin. Salt solution level on outside package must higher than the flaps. ► Dip the positive probe (Red) of the ammeter inside the package, the negative one (Black) into the solution in the bowl ► Note! Check the battery of ammeter before testing PE-05/2012-04-01 / 11 2. Conductivity Test Evaluation of the samples  Negative reading If the reading is 0 μA  • Positive reading If the reading is >0 μA - If the reading is unsteady, wipe the edge once more and make a new reading. If still unsteady, let the sample dry. - If the deflection is quick and steady, steady there is uncovered Al-foil. The sample must be further confirmed by red ink test for package integrity  PE-05/2012-04-01 / 12 6 26/09/2012 3 R 3. Red d IInk kT Testt Conductivity and Red Ink Test PE-05/2012-04-01 3. Red Ink Test Principle ► An aseptic p p package g is defined as leaking g when red Ink penetrates through all coating layers (inside PE + Al-foil + laminate) and leave stains on the paperboard. PE-05/2012-04-01 / 14 7 26/09/2012 3. Red Ink Test Preparation of the samples Cut the packages in two halves or keep the package in one sample. ► During trouble shooting a hole can be cut out in the front panel of the package. This allows investigation of the package as a whole. ► Dry carefully the inside of the halves of packages with a paper towel ► PE-05/2012-04-01 / 15 3. Red Ink Test Procedure Pour red ink inside the half package red ink must over the package, critical points of the package, such as corners, TS, crosses. ► Leave the red ink inside the package for at least 5 minutes. ► Remove the excess of red ink with the pipette. *** Note! Do not pour po r red ink out o t ► of the package as this could lead to false positive reading. ► Dry the package thoroughly, wet ink left in the package could jeopardise the result and create a false positive reading PE-05/2012-04-01 / 16 8 26/09/2012 4. Red Ink Test Evaluate the samples the ink has dried, unfold the flaps and peel off the outer layer. ► To facilitate evaluation it is recommended that the paperboard is peeled off starting from the edge of the LS. ►Visually inspect the package. If any ink has penetrated this is considered a defect. Integrity ►When Defective PE-05/2012-04-01 / 17 4. Red Ink Test Evaluate the samples ►If the red ink spot is larger on the peeled external layer than on the package side, it means that the ink has leaked from the OUTSIDE of the package to the INSIDE ►This is NOT an integrity defect but is a false positive. p ►It is very important to ensure that there are no ink spillage on the working station during this test as it could interfere with the result. PE-05/2012-04-01 / 18 9 26/09/2012 End of conductivity and d Red R d ink i k test t t PE-05/2012-04-01 A Appendix di –Chemicals Ch i l Red ink and Copper solution PE-01/2012-04-01 10 26/09/2012 Appendix : Chemicals Leak detection fluid – Red ink TP Part no. 90298-26 PE-01/2012-04-01 / 21 Appendix : Chemicals Leak detection fluid – Red ink PE-01/2012-04-01 / 22 11 26/09/2012 Appendix : Chemicals Leak detection fluid – Red ink PE-01/2012-04-01 / 23 12